Standard for lamps



(No Model.) 7

O. LUETKE. STANDARD FOR LAMPS.

No. 409,214. Patented Aug. 20, 1889.

Witnesses Inventor:

N. PETERS, Phum-Li'hngmphur, Wanhi nnnnnnnn C UNITED STATES PATENT Orricn.

OSCAR LUETKE, OF BROOKLYN, NE\V YORK.

STANDARD FOR LAMPS.

SPECIFICATION forming part of Letters Patent No. 409,214,, dated August 20, 1889.

Application filed November 1, 188

To all whom it may concern.-

Be it known that I, OSCAR LUETKE, of Brooklyn, Kings county, State of New York, have invented a new and useful Improvement in Adjustable Standards, of which the following is a specification.

Myinvention relates to an improvement in adjustable standards, such as are used on piano-lamps, music-stands, and similar articles; and the object of my invention is to pro- Vide a bearing-surface for the protruding parts of the adjusting mechanism, which surface will yield sufficiently or become indented so as to give the slide a hold without showing any dents on the outside of the standard and without cutting or abrading the inside of the stationary part of the standard and. wearing it out. I attain these objects by the combination illustrated in the accompanying drawing, showinga standard in section, in whicl1- A A represent the lower stationary part of the standard; B, a fixed internal tube; 0, the slide with an expanding mechanism 1) attached. E shows an indentu re in the tube 13. The tube B made of annealed brass or a similar soft meta-l thin enough to yield and strong enough to carry the slide. Any one of the various expanding mechanisms applicable to ad justable standardsas, for instance, the one for which Letters Patent No. 390,381 were granted to me October 2, 1SSS-havin g one or more parts or j aws which are caused to expand, widen out, project, or protrude from the slid- 8- Serial Njo. 289,764. (No model.)

ing part 0 within the part A A when the slide is to step, may be used in combination with my improvement, which consists of the softmeial tube 13, inserted and fixed into thestandard A A and containing the slide 0 with ex panding mechanism D. When Dis expanded, it will cause a suflicient indentation in the tube 13 to give the slide O a hold or restingplace without showing any dent on the outside of A A to spoil its appearance, and without injuring, abrading, or wearing out the inside of A A. \Vhen the tube B becomes dented all over, then the expanding part I) will naturally slip into one of the dents already made, so that the tube ll remains equally good for its purpose no matter how often the slide is set.

Having fully described myinvention, what I claim as new, and desire to secure by Letters l Patent, is

An adjustable standard consisting of an upright stationary tube, a movable tube telescoping into the stationary tube, a soft-metal tube supported in the stationary tube, and an expanding mechanism attached to the telescoping tube and longitudinally adjustable in the soft-metal tube and constructed to pro duce indentures in the soft-metal tube to hold it in its adjusted position.

OSCAR LUE'IKE. Witnesses:

A. LANGERFELD, Sr. 'HEUSLER. 

